How do you convert a file from Audacity (.aup) to an mp3?

Answer 1

to do that you need the lame mp3 encoder found here:

http://lame.buanzo.com.ar/libmp3lame-win-3.97.zip

extract that to a folder here you wont forget it. open audacity, open the audio project, click on edit>preferences>file formats>find library>open the lame_enc.dll file that you just extracted. to the left of the find library button is a drop down menu of the available bit rats for your mp3. the lower the number the worse the quality but the less space it uses. 128 is a good compromise of space and quality where 320 is "cd quality". click ok. click on file>export as mp3>pick a name to save it as and there you go.

Answer 2

If you have Audacity, load it in and select Export as MP3 on the File menu. There is a program called Switch, I think from the same company, that also should do it.